Platformization lower vehicle body structure of electric vehicle

Abstract

The platform lower vehicle body structure of the electric vehicle comprises a floor assembly, a front wall assembly and threshold assemblies, the threshold assemblies are arranged on the left side and the right side of the floor assembly respectively, and the floor assembly comprises a front floor assembly, a middle floor assembly and a rear floor assembly which are sequentially connected from front to back. The front wall assembly is arranged at the front end of the front floor assembly, a front anti-collision beam assembly is arranged in front of the front wall assembly, front longitudinal beam assemblies are arranged on the left side and the right side of the front end of the front wall assembly respectively, and energy absorption boxes on the left side and the rear side of the front anti-collision beam assembly are connected with the front ends of the two front longitudinal beam assemblies respectively. The method can effectively shorten the development time of different types of electric vehicles and reduce the development cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicles, and in particular relates to a platform lower body structure of an electric vehicle. Background Art

[0002] When designing existing electric vehicles, when the size of the vehicle model changes, it is often restricted by the lower body structure, making it difficult to have large changes in length (i.e., the length in the longitudinal direction of the vehicle), width (i.e., the length in the lateral direction of the vehicle), and height (i.e., the length in the vertical direction of the vehicle), and it is difficult to form differentiated vehicle models and expand the product spectrum. In order to develop vehicles of different models, most of the components in the lower body structure need to be redeveloped, which leads to a long development time and high development costs. Therefore, how to design a platform lower body structure for electric vehicles to shorten the development time of different models of electric vehicles and reduce development costs has become a technical problem that technicians in this field urgently need to solve. Summary of the invention

[0003] The purpose of the present invention is to provide a platform lower body structure of an electric vehicle to solve the above-mentioned technical problems in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A platform lower body structure of an electric vehicle comprises a floor assembly, a front enclosure assembly and a door sill assembly, the door sill assembly being respectively arranged on the left and right sides of the floor assembly, the floor assembly comprising a front floor assembly, a middle floor assembly and a rear floor assembly which are sequentially connected from front to rear, the front enclosure assembly being arranged on the front end of the front floor assembly, a front anti-collision beam assembly being arranged in front of the front enclosure assembly, a front longitudinal beam assembly being respectively arranged on the left and right sides of the front end of the front enclosure assembly, and energy absorption boxes on the left and rear sides of the front anti-collision beam assembly being respectively connected to the front ends of the two front longitudinal beam assemblies.

[0006] Preferably, the threshold assembly comprises two threshold inner panel front sections, which are respectively arranged on the left and right sides of the front end of the front floor assembly, and the top surfaces of the threshold inner panel front sections are provided with door opening arc surfaces for matching with the door opening of the upper vehicle body.

[0007] Preferably, the rear floor assembly includes a rear floor, two rear floor patching plates, a spare tire pool plate and two rear floor connecting plates, the two rear floor patching plates are relatively arranged on the left and right sides of the rear floor, the rear ends of the rear floor and the two rear floor patching plates are respectively connected to the front ends of the spare tire pool plate, and the two rear floor connecting plates are respectively arranged on the left and right sides of the rear end of the spare tire pool plate.

[0008] Preferably, the rear floor assembly also includes a rear anti-collision beam assembly, and the left and right sides of the rear end surface of the spare tire pool plate are respectively connected to the front ends of the energy absorption boxes on the left and right sides of the rear anti-collision beam assembly.

[0009] Preferably, the front enclosure assembly includes a front enclosure left side assembly, a front enclosure middle part assembly and a front enclosure right side assembly, and the front enclosure left side assembly and the front enclosure right side assembly are respectively connected to the left side and the right side of the front enclosure middle part assembly.

[0010] Preferably, it further comprises two front wheel bag assemblies, the two front wheel bag assemblies are respectively arranged on the two front longitudinal beam assemblies, and the two front wheel bag assemblies are both provided with a front shock absorber mounting plate.

[0011] Preferably, it further comprises two rear wheel bag assemblies, which are respectively arranged on the left and right sides of the rear floor assembly, and the two rear wheel bag assemblies are both provided with rear shock absorber mounting plates.

[0012] Preferably, a seat cross beam is provided on the floor assembly, and the seat cross beam is a rolled part.

[0013] The beneficial effects of the present invention are:

[0014] The electric vehicle platform lower body structure of the present invention can better meet the changing requirements of different models for the front overhang size when the front overhang size of the developed vehicle changes, only by adjusting the length of the energy absorption box on the left and rear sides of the front bumper beam assembly in the longitudinal direction of the vehicle, thereby effectively shortening the development time of different models and reducing development costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments, and further describe the specific embodiments of the present invention in detail in conjunction with the drawings, wherein

[0016] Figure 1 A schematic diagram of the structure of the front of the front enclosure assembly provided by an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of a front floor assembly provided by an embodiment of the present invention;

[0018] Figure 3 Schematic diagram of a rear floor assembly provided by an embodiment of the present invention

[0019] Figure 4 A schematic diagram of the bottom surface of a spare tire pool plate provided in an embodiment of the present invention;

[0020] Figure 5A schematic diagram of a rear anti-collision beam assembly and a spare tire pool plate provided in an embodiment of the present invention when connected;

[0021] Figure 6 A schematic diagram of a rear anti-collision beam assembly provided by an embodiment of the present invention;

[0022] Figure 7 A partial schematic diagram of a lower vehicle body structure provided by an embodiment of the present invention;

[0023] Figure 8 A schematic diagram of a front cowl assembly provided by an embodiment of the present invention;

[0024] Fig. 9 A cross-sectional view of the connection between the door sill assembly and the center floor assembly provided in an embodiment of the present invention;

[0025] Fig.10 A schematic diagram of a lower vehicle body structure provided by an embodiment of the present invention;

[0026] Fig.11 A schematic diagram of the position change of the front shock absorber mounting plate provided in an embodiment of the present invention;

[0027] Fig.12 A schematic diagram of the position change of the rear shock absorber mounting plate provided in an embodiment of the present invention.

[0028] Markings in the accompanying drawings:

[0029] 1. The front end of the front longitudinal beam assembly, 2. The curved surface of the door opening, 3. The right side of the front enclosure assembly,

[0030] 4. Rear wheel assembly, 5. Front longitudinal beam assembly, 6. Subframe mounting point,

[0031] 7. Front wheel assembly, 8. Front anti-collision beam assembly,

[0032] 9. Energy absorption boxes on the left and right sides of the front anti-collision beam assembly,

[0033] 10. Front floor assembly, 11. Front section of door sill inner panel, 12. Rear anti-collision beam assembly,

[0034] 13. Energy absorption boxes on the left and right sides of the rear anti-collision beam assembly, 14. Spare tire pool plate,

[0035] 15. Rear section of rear floor longitudinal beam, 16. Rear floor connecting plate, 17. Front enclosure assembly,

[0036] 18. Floor assembly, 19. Door sill assembly, 20. Side panel, 21. Front panel left side assembly,

[0037] 22. Front center assembly, 23. Seat crossbeam connecting plate, 24. Inner lap joint,

[0038] 25. Middle floor assembly, 26. Seat crossbeam, 27. Rear shock absorber mounting plate,

[0039] 28. Rear floor, 29. Rear floor patch plate, 30. Front shock absorber mounting plate. DETAILED DESCRIPTION

[0040] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0041] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0042] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0043] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0044] like Figures 1 to 12 As shown, an embodiment of the present invention provides a platform lower body structure of an electric vehicle, which includes a floor assembly 18, a front enclosure assembly 17 and a door sill assembly 19, the door sill assembly 19 is respectively arranged on the left and right sides of the floor assembly 18, the floor assembly 18 includes a front floor assembly 10, a middle floor assembly and a rear floor assembly which are sequentially connected from front to rear, the front enclosure assembly 17 is arranged on the front end of the front floor assembly 10, a front anti-collision beam assembly 8 is arranged in front of the front enclosure assembly, a front longitudinal beam assembly 5 is respectively arranged on the left and right sides of the front end of the front enclosure assembly, and energy absorption boxes 9 on the left and rear sides of the front anti-collision beam assembly are respectively connected to the front ends of the two front longitudinal beam assemblies.

[0045] Furthermore, the sill assembly has two sill inner panel front sections 11, which are respectively arranged on the left and right sides of the front end of the front floor assembly 10, and the top surface of the sill inner panel front section 11 is provided with a door opening arc surface 2 for matching with the door opening of the upper vehicle body. With this solution, when the wheelbase of the vehicle needs to be changed, the requirements for wheelbase changes and vehicle door opening shape changes can be better met by redeveloping the two sill inner panel front sections.

[0046] Specifically, Figure 3As shown, the rear floor assembly includes a rear floor 28, two rear floor patching plates 29, a spare tire pool plate 14 and two rear floor connecting plates 16. The two rear floor patching plates are relatively arranged on the left and right sides of the rear floor. The rear ends of the rear floor and the two rear floor patching plates are respectively connected to the front ends of the spare tire pool plate. The two rear floor connecting plates are respectively arranged on the left and right sides of the rear end of the spare tire pool plate. With this solution, by adjusting the widths of the two rear floor patching plates, the width of the spare tire pool plate and the widths of the two rear floor connecting plates, the width requirements of the rear floor assembly for different vehicle models can be better met.

[0047] Furthermore, the rear floor assembly also includes a rear anti-collision beam assembly 12, and the left and right sides of the rear end surface of the spare tire pool are respectively connected to the front ends of the energy absorption boxes 13 on the left and right sides of the rear anti-collision beam assembly. With this solution, by adjusting the length of the energy absorption boxes 13 on the left and right sides of the rear anti-collision beam assembly in the longitudinal direction of the vehicle, the rear overhang size can be easily fine-tuned to meet the requirements of different models for the rear overhang size.

[0048] Specifically, Figure 8 As shown, the front enclosure assembly 17 includes a front enclosure left assembly 21, a front enclosure middle assembly 22 and a front enclosure right assembly 3, wherein the front enclosure left assembly and the front enclosure right assembly are respectively connected to the left and right sides of the front enclosure middle assembly. With this solution, when the vehicle model requires a change in the width of the vehicle, by adjusting the width of the front enclosure left assembly and the front enclosure rear assembly, the width requirements of the front enclosure assembly 17 of different vehicle models can be better met. In this case, the front enclosure middle assembly can be universal.

[0049] Furthermore, the platform lower body structure of the electric vehicle also includes two front wheel bag assemblies, which are respectively arranged on the two front longitudinal beam assemblies, and the two front wheel bag assemblies are both provided with front shock absorber mounting plates; the platform lower body structure of the electric vehicle also includes two rear wheel bag assemblies, which are respectively arranged on the left and right sides of the rear floor assembly, and the two rear wheel bag assemblies are both provided with rear shock absorber mounting plates. This solution is adopted to facilitate meeting the requirements of vehicle size changes in height.

[0050] Specifically, a seat crossbeam is provided on the floor assembly, and the seat crossbeam is a rolled part, so that the size of the seat crossbeam in the lateral direction of the vehicle can be easily adjusted, thereby better meeting the requirements of vehicle models with different widths.

[0051] When different vehicle models are developed using the platform-based lower body structure of an electric vehicle provided by an embodiment of the present invention, when the front overhang size of the developed vehicle needs to change, the change in the front overhang size can be met by adjusting the length of the energy absorption box on the left and rear sides of the front bumper beam assembly 8 in the longitudinal direction of the vehicle, thereby being able to conveniently change the front overhang size according to the different developed vehicle models.

[0052] Specifically, when designing the front longitudinal beam assembly 5, the length of the front longitudinal beam assembly, i.e., the position of the front end face 1 of the front longitudinal beam assembly, is determined based on the maximum size of the power compartment that can accommodate different vehicle models, so that the front longitudinal beam assembly 5 can be universalized and can better meet the layout requirements of the subframe mounting point 6 and the power compartment. At the same time, when designing the rear wheel bag assembly 4 and the front wheel bag assembly 7, the design is based on the maximum tire envelope required by different vehicle models to achieve universality of the main components in each wheel bag assembly, thereby facilitating the platform design of the vehicle model and shortening the development cycle. It can be understood that the above-mentioned different vehicle models are all models that need to be developed using the lower body structure.

[0053] Furthermore, when the developed vehicle needs to change in wheelbase, the change in wheelbase can be met by adjusting the position of the front end trim line of the front floor assembly 10 in the longitudinal direction of the vehicle and redeveloping the front section of the rocker inner panel 11 .

[0054] Specifically, when developing the front floor assembly 10, the size of each vehicle model is first determined, and then the largest size of the front floor assembly 10 is developed according to the size of the vehicle model with the largest wheelbase to meet the needs of the vehicle model with the largest wheelbase; then, for vehicles with other wheelbases, the front end trimming line of the front floor assembly 10 is adjusted in the longitudinal direction of the vehicle according to the size of the wheelbase, and then the trimming die is used to cut at the front end trimming line, so as to meet the changing needs of the wheelbase of different vehicles. At the same time, only one trimming die needs to be developed at this time, so as to minimize the cost of developing the mold.

[0055] Due to the changes in the sizes of different vehicle models, the upper body is basically reshaped, which will cause changes in the curvature of the door opening of the upper body. When the front section 11 of the rocker inner panel is redeveloped, it can not only meet the changes in the wheelbase, but also make the curvature of the door opening curved surface 2 on the front section of the rocker inner panel match the curvature of the door opening on the upper body, thereby better meeting the needs of changes in the shape of the vehicle door opening. At this time, there is no need to change other structures to meet the changes in the curvature of the upper body door opening, thereby effectively reducing the development cost.

[0056] Furthermore, when the vehicle under development needs to change in the size of the rear overhang, the change in the size of the rear overhang can be met by adjusting the length of the spare tire pool 14 in the longitudinal direction of the vehicle, or by adjusting the length of the energy absorption boxes 13 on the left and right sides of the rear anti-collision beam assembly in the longitudinal direction of the vehicle. With this solution, when the change in the size of the rear overhang is small and needs to be fine-tuned, that is, when there is no need to change the size of the trunk, that is, when the spare tire pool is lengthened or shortened: it can be achieved by adjusting the length of the two energy absorption boxes in the rear anti-collision beam assembly in the longitudinal direction of the vehicle or by changing the rear shape of the rear anti-collision beam assembly. Specifically, when the change in the size of the rear overhang can be met by changing the shape, the shape change is used alone to reduce development costs; when the change in the size of the rear overhang requires a change in the position of the lower mounting point of the rear bumper, the change in the size of the rear overhang is met by adjusting the length of the two energy absorption boxes in the rear anti-collision beam assembly in the longitudinal direction of the vehicle. At the same time, it can also meet the position change of the lower mounting point of the rear bumper and meet the installation requirements of the rear bumper. ; When the rear overhang size changes significantly, that is, when the trunk size needs to be enlarged or shortened, or when the rear overhang size change needs cannot be met by changing the rear styling and adjusting the lengths of the two energy absorption boxes in the rear anti-collision beam assembly in the longitudinal direction of the vehicle, the rear overhang size change needs can be met by adjusting the length of the spare tire pool 14 in the longitudinal direction of the vehicle. At this time, the lengths of the rear sections 15 of the left and right rear floor longitudinal beams in the longitudinal direction of the vehicle can also be adjusted synchronously with the size changes of the spare tire pool 14. At the same time, after adjusting the length of the spare tire pool 14 in the longitudinal direction of the vehicle, the rear overhang size can also be fine-tuned by adjusting the lengths of the two energy absorption boxes in the rear anti-collision beam assembly in the longitudinal direction of the vehicle, so as to better meet the rear overhang size needs of different models.

[0057] Furthermore, when the vehicle being developed requires a change in width:

[0058] By adjusting the lengths of the left side assembly 21 and the right side assembly 3 of the front enclosure in the transverse direction of the vehicle, the width change requirement of the front enclosure assembly can be met;

[0059] By adjusting the lengths of the two rear floor panels, the spare tire pool plate 14 and the two rear floor connecting plates 16 in the transverse direction of the vehicle, the width change requirements of the rear floor assembly can be met;

[0060] By adjusting the positions of the trimming lines on the left and right sides of the front floor assembly 10 and the middle floor assembly in the transverse direction of the vehicle, the width change requirements of the front floor assembly and the middle floor assembly can be met; the length of the inner lap surface 24 of the door sill assembly in the transverse direction of the vehicle is adjusted so that the inner lap surface overlaps the front floor assembly and the middle floor assembly respectively. At this time, after adjusting the positions of the trimming lines on the left and right sides of the front floor assembly and the middle floor assembly in the transverse direction of the vehicle, the trimming dies can be used for cutting. At the same time, by adjusting the length of the inner lap surface 24 of the door sill assembly in the transverse direction of the vehicle, the inner lap surface can be overlapped with the front floor assembly and the middle floor assembly respectively, so as to facilitate the maximum commonality of the trimming dies of the front floor assembly 10 and the middle floor assembly 25; when designing, the seat cross beam 26 adopts a rolling part, so that when the width of the vehicle changes, the length of the seat cross beam in the transverse direction of the vehicle can be adjusted, so as to better ensure that the seat cross beam 26 is connected to the seat cross beam connecting plate 23.

[0061] Specifically, when the wheelbase and width of the vehicle model are changed, the length and width of the front floor assembly are comprehensively considered according to the wheelbase and width, and then the trimming die is used to cut it. When the rear overhang size and width are changed, the length and width of the spare tire pool 14 can be comprehensively considered, and then the spare tire pool can be redeveloped.

[0062] In one embodiment, when the width of the developed vehicle needs to change slightly, that is, the width needs to be fine-tuned, the width change requirement of the vehicle model can be met by adjusting the position of the side surface 20 overlapped on the outside of the threshold assembly 19 in the transverse direction of the vehicle. When the width of the vehicle model changes greatly, if this method is still used, it will cause difficulty in stamping for the threshold assembly 19 or the width of the threshold assembly is large, which will affect the convenience of passengers getting on and off the vehicle. At this time, it is necessary to adjust the width of the front wall assembly 17 and the floor assembly 18, that is, the length in the transverse direction of the vehicle, to meet the change in the width of the vehicle model. After adjusting the width of the front wall assembly 17 and the floor assembly 18 to adjust the width of the vehicle model, the width of the vehicle model can be adjusted again, that is, fine-tuned, by adjusting the position of the side surface 20 overlapped on the outside of the threshold assembly 19 in the transverse direction of the vehicle, so as to better meet the width requirements of different vehicle models.

[0063] Specifically, Fig.11 and Fig.12 As shown, when the height of the developed vehicle needs to change, the height change requirement of the vehicle can be met by adjusting the two front shock absorber mounting plates 30 arranged on the left and right front wheel package assemblies and the two rear shock absorber mounting plates 27 arranged on the left and right rear wheel package assemblies in the vertical direction of the vehicle, so as to better realize the height change of different vehicle models. At this time, the height can be represented by Z, Fig.11 and Fig.12The dotted lines in pictorial represent the positions of the front shock absorber mounting plate and the rear shock absorber mounting plate after the positions are changed.

[0064] The electric vehicle platform lower body structure of the present invention can better meet the changing requirements of different vehicle models for the longitudinal, lateral and vertical dimensions of the vehicle, thereby effectively shortening the development time of different vehicle models and reducing development costs.

[0065] The present invention can better meet the requirements of different models for length, width and height changes by changing some parts in the lower body structure, especially in the length direction of the vehicle, i.e., the longitudinal direction of the vehicle, and can conveniently realize the changes in the dimensions of the front overhang, wheelbase and rear overhang, providing multiple options for vehicle model changes. At the same time, the maximization of common parts in the lower body structure is achieved. The present invention realizes the changes in corresponding dimensions by minimizing the changes in corresponding parts in the lower body structure and maximizing the use of molds to meet the requirements of different models for length, width and height, and can effectively reduce the cost of vehicle model development and shorten the cycle of vehicle model development.

[0066] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A platform lower body structure of an electric vehicle, characterized in that: It includes a floor assembly, a front panel assembly and a door sill assembly. The door sill assembly is respectively arranged on the left and right sides of the floor assembly. The floor assembly includes a front floor assembly, a middle floor assembly and a rear floor assembly which are sequentially connected from front to rear. The front panel assembly is arranged on the front end of the front floor assembly. A front anti-collision beam assembly is arranged in front of the front panel assembly. A front longitudinal beam assembly is respectively arranged on the left and right sides of the front end of the front panel assembly. Energy absorption boxes on the left and rear sides of the front anti-collision beam assembly are respectively connected to the front ends of the two front longitudinal beam assemblies.

2. The platform lower body structure of an electric vehicle according to claim 1, characterized in that: The threshold assembly is provided with two threshold inner panel front sections, which are respectively arranged on the left and right sides of the front end of the front floor assembly, and the top surfaces of the threshold inner panel front sections are provided with door opening arc surfaces for matching with the door opening of the upper vehicle body.

3. The platform lower body structure of an electric vehicle according to claim 1, characterized in that: The rear floor assembly includes a rear floor, two rear floor patching plates, a spare tire pool plate and two rear floor connecting plates, the two rear floor patching plates are relatively arranged on the left and right sides of the rear floor, the rear ends of the rear floor and the two rear floor patching plates are respectively connected to the front ends of the spare tire pool plate, and the two rear floor connecting plates are respectively arranged on the left and right sides of the rear end of the spare tire pool plate.

4. The platform lower body structure of an electric vehicle according to claim 3, characterized in that: The rear floor assembly also includes a rear anti-collision beam assembly, and the left and right sides of the rear end surface of the spare tire pool plate are respectively connected to the front ends of the energy absorption boxes on the left and right sides of the rear anti-collision beam assembly.

5. The platform lower body structure of an electric vehicle according to claim 1, characterized in that: The front enclosure assembly comprises a front enclosure left side assembly, a front enclosure middle part assembly and a front enclosure right side assembly, and the front enclosure left side assembly and the front enclosure right side assembly are respectively connected to the left side and the right side of the front enclosure middle part assembly.

6. The platform lower body structure of an electric vehicle according to claim 1, characterized in that: It also includes two front wheel bag assemblies, which are respectively arranged on the two front longitudinal beam assemblies, and the two front wheel bag assemblies are both provided with front shock absorber mounting plates.

7. The platform lower body structure of an electric vehicle according to claim 1, characterized in that: It also includes two rear wheel bag assemblies, which are respectively arranged on the left and right sides of the rear floor assembly, and the two rear wheel bag assemblies are both provided with rear shock absorber mounting plates.

8. The platform lower body structure of an electric vehicle according to any one of claims 1 to 7, characterized in that: The floor assembly is provided with a seat crossbeam, which is a rolled part.

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